<template>
  <div class="my-counter">
    <!-- 判断是否大于等于1 -->
    <button
      type="button"
      class="btn btn-light"
      @click="good.goods_count <= 1 || good.goods_count--"
    >
      -
    </button>
    <!-- v-model关联对象的goods_count属性和输入框 -->
    <input
      type="number"
      class="form-control inp"
      v-model.number="good.goods_count"
      @blur="countBlur"
    />
    <button type="button" class="btn btn-light" @click="good.goods_count++">
      +
    </button>
  </div>
</template>

<script>
export default {
  props: {
    good: Object,
  },
  // 侦听数量改变, 小于1, 直接强制覆盖1
  methods: {
    countBlur() {
      if (this.good.goods_count < 1) {
        this.good.goods_count = 1
      }
    },
  },
};
</script>

<style lang="less" scoped>
.my-counter {
  display: flex;
  .inp {
    width: 45px;
    text-align: center;
    margin: 0 10px;
  }
  .btn,
  .inp {
    transform: scale(0.9);
  }
}
</style>